Categories
Middle School MS Summer Science SCIENCE

Simple and Compound Machines

image_pdfDownload
Bookmark(0)

Page 2 Page 4




This book developed by ©Academy Global Learning 2020
All rights reserved under ©Academy Global Learning 2020. No part of this publication may be reproduced, stored in a retrieval system, or transmitted in any form or by any means, electronic, mechanical, photocopying, recording, or otherwise, without the prior written permission of the copyright owner.

Designed By:
Christian Alas
Created and illustrated By:
Angelo Romero and Camilo Sanabria

Simple and Compound Machines

A simple machine is a mechanical device that changes the direction or magnitude of a force. Simple machines do work with one single movement.

There are six simple machines that are the basis for all complex machines. These simple machines are the lever, the wheel and axle, the wedge, the pulley, the inclined plane, and the screw.

Compound machines are made up of two or more simple machines working together. The mechanical advantage is the amount of effort saved when using simple or complex machines.

– 2 –

An example of a compound machine is a bicycle. Although it doesn’t seem like it, a bicycle is a rather complex compound machine. A bicycle uses screws, wheels, a wheel and axle system, pedals that turn a pulley, gear shifts, and brake handles that are levers.

– 3 –

Although at first it may appear that simple and compound machines are unrelated to science, they are really made up of the many complex concepts and theories of physics. Physics is the science that deals with matter, energy, motion, and force.

– 4 –

READING QUESTIONS

1. What is the writer’s main idea?

______________________________________
______________________________________
______________________________________

2. What example supports the writer’s main idea?

______________________________________
______________________________________
______________________________________

– 6 –

3. How does the example help the writer’s argument?

______________________________________
______________________________________
______________________________________

4. What do you think about the story?

______________________________________
______________________________________
______________________________________

– 7 –